Abstract
A successful decolorization of methylene blue (MB) was achieved through advanced Fenton's process (AFP) coupled with sonolysis (sono-AFP) using zero-valent iron (Fe0) aggregate as a catalyst. The decolorization was dependent on the pH, Fe0, H2O2 doses, and acoustic power. Fe0 aggregate was reusable. A modified pseudo-first order equation was developed to describe the decolorization kinetics. To save electricity, short ultrasound irradiation was applied to the system. MB was completely degraded in the sono-AFP under optimized condition. The decolorization was obviously inhibited by the presence of Cl−, but it was unaffected by the presence of H2CO3, H2PO4−, ClO4−, NO3−, and SO42−
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